3

我告诉他们我需要用 Gstreamer Hayo 实现 opencv,但不需要如何在管道 gstreamer 上用 opencv 编写。这个想法是通过 OpenCV 获取图像和网络摄像头,并使用 GStreamer 处理一些过滤器。

另外,如果我想告诉 VideoCapture() 从 v4l2src device = /dev/video1 获取数据,或者未能将其写入 v4l2src device = /dev/video0(使用 linux,并且我有一个 disp 虚拟视频,video0)抛出我出现以下错误

GStreamer:在函数 cvCaptureFromCAM_GStreamer 的手动管道中找不到 appsink

import cv2

cv2.namedWindow('webCam')
cap = cv2.VideoCapture(1)  # "v4l2src device=/dev/video1"
# cap.open("img/bg.avi")


if cap.isOpened():
    ret, frame = cap.read()
else:
    ret = False
    print "problema aqui?"


while True:
    #se toma cada frame
    ret,frame = cap.read()
    frame = cv2.flip(frame,1)

    cv2.imshow('webCam', frame)

    width = cap.get(cv2.CAP_PROP_FRAME_WIDTH)
    height = cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
    # cv2.imwrite("/dev/video0", frame)
    fourcc = cv2.VideoWriter_fourcc('m','p','4','v')
    pathVid = "/dev/video0" # 'img/output2.avi'
    # out = cv2.VideoWriter(pathVid, fourcc, 30, (width,height))
    out = cv2.VideoWriter(pathVid, fourcc, 30, (640,480))
    out.write(frame)
    cv2.VideoWr
    esc = cv2.waitKey(5) & 0xFF == 27
    if esc:
        break

cap.release()
cv2.destroyAllWindows()
4

1 回答 1

1

首先,尝试以下命令,

gst-launch-1.0 v4l2src device=/dev/video0 ! videoconvert ! ximagesink
于 2020-06-17T03:00:57.797 回答